In the new Yosemite 10.10.2 , Apple's security mechanism, called Kext Signing.(kind of verification)
This Verification will check the system within the security of all the hard drivers, if a third party has not proven,those hardware can't be work on 10.10.2
MacBook Pro with Retina display, iOS 8.1.3, 10.10.2
I don't see a question posted. If you are simply making a statement, then this is not the proper venue for you.
i was upgraded Transcend JetDrive 725ssd and that can't pass Apple's ''Kext Signing'' (kind of verification of security)
so when apple release new update for OS X and you updated it. you will get stop logo with black screen at boot up your MBP.
Sorry , cuz that's my first time use Apple Support Communities.
i was upgraded the Transcend 725 SSD for my MBP.
the question is my MBP was update to 10.10.2, but when update completed and automatic Re-Boot the MBP i got the black screen with STOP logo.
except use Time Machine back to 10.10.1. does any option can keep both ?(i mean Transcend SSD and work on Yosemite 10.10.2)
this is a known issue when using TRIM enabler for 3rd party SSDs and then update to Yosemite.
If you are using TRIM enabler you should check their Website.
TRIM is off but still getting same situation.
I understood you cannot boot up the Mac because kext checking is preventing it from booting.
How did you get the JetDrive Toolbox window? I assume after reverting back to 10.10.1 - right?
Did you experience the same issue when updating from 10.10.0 to 10.10.1?
Did you try to remove the JetDrive Toolbox before the update? Is it possible the toolbox loads an unsigned driver, even with TRIM disabled.
What does the system message say when getting the stop?
Does it say that a driver has been modified and is not allowed to load?
If it's not a modified driver which causes the issue with kext-signing enabled (will be re-enabled by updating the system) than I have no idea.
Good luck!
Thank you soooo much !!!!!
you're right! i was using Time Machine back to 10.10.1 then take the screen shot
but even i turn-off the TRIM in 10.1, it still stuck in boot up black screen,
so I decided just back to 10.9(Maverick) then step by step update to 10.10.2
I followed your suggestion. I remove that freaking toolbox , then it's WORKED!!!!!
I SUCCEED!!!
but i don't have bravery to turn-on TRIM again
AngraPan84123 wrote:
but i don't have bravery to turn-on TRIM again
Then don't Depending on your usage patterns, it may not be needed.
http://www.bit-tech.net/hardware/apple/2010/07/01/mac-ssd-performance-trim-in-os x/1
I'm glad you could boot your Mac again.
I will receive my 3rd party SSD (Samsung EVO 850) beginning of next week and I do NOT plan to enable TRIM.
From reading several posts I feel I do not need TRIM because
As far as I read if your SSD has free space and enough idle time to do its own garbage collection you don't need TRIM.
Did you check if your SSD brings its own garbage collection (firmware)?
Hi Homartens:
I ran into your reply on the question of SSD 3rd party compatibility and Yosemite Upgrade.
I hope you can help, I would like to upgrade to Yosemite but I have seen write ups that warn about the upgrade if you have 3rd party SSD in your system.
My question is...... I have an ORIGINAL APPLE SSD that came with my MacPro in my main boot drive and also an external Samsung 840 EVO drive that I use on and external connection to the MacPro via thunderbolt. is the problem of the upgrade to Yosemite and lockups ONLY RELATED to 3rd party INTERNAL BOOT drives or also affect the external drive.
At present I am using Maverick latest version and all is working well. I have never worked with trim or have an idea of what it does, but I don't know if anything will happen to the external samsung if I upgrade.
Your help will be greatly appreciated,
Thanks,
AppleLou
AppleLou wrote:
is the problem of the upgrade to Yosemite and lockups ONLY RELATED to 3rd party INTERNAL BOOT drives or also affect the external drive.
The lockup is caused by Trim Enabler, not the drive itself, whether internal or external. With an Apple drive, you wouldn't need Trim Enabler.
Thank You Barney-15E,
i don't know what Trim Enabler does but I don't even know if I am using it.
If my Main Internal Boot drive is OEM Apple and it does not need Trim Enabler then it should be good for upgrade to Yosemite, but my worry is the 3rd Party external Samsung EVO SSD that I use as a media drive, ,will that be affected, lock up, or does it use Trim Enabler???? When I installed this drive I only formatted it for Mac OS to be used on Maverick and never used any installation software for any Trim process
Can You clarify your help is greatly appreciated.
Thanks,
AppleLou
You would have to install Trim Enabler. It has nothing to do with any particular drive. It is third-party software to enable TRIM for non-Apple SSD's.
I'm using Yosemite 10.10.2 and my internal boot device is a Samsung EVO 850.
I do NOT have TRIM enabler installed / used as it violates kext signing.
My system is running perfectly fine in regards to boot and performance etc.
If you like to read about TRIM enabler check it up here:
Yosemite 10.10.2 Kext Signing block the 3rd party developer's SSD
